Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5cfb713937e82f…

MALICIOUS

PDF

81.4 KB Created: 2021-04-14 15:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 59a6a4ef823520a38704410260e71447 SHA-1: faecbb236bdfad1440907e4676045d0be8a09e19 SHA-256: 6d5cfb713937e82fc8f82ccb3e58ee9ec9122190da751d1d7534ec97de1e3a0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for a large number of external links, with one prominent link pointing to 'ponafet.ru'. The document body, though partially corrupted, includes the phrase 'How to change schlage lock key', suggesting a lure to a phishing or malware distribution site. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/strik?utm_term=how+to+change+schlage+lock+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474218/normal_5fcff2aac6ec5.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/jirYigU/falling_waters_trail_mt_lafayette.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_6050ee5ad2b03.pdfIn PDF document text
    • http://goterebilife.22web.org/vasovagal_syncope_handout.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/iMieiit/bollinger_bands_trading_strategy_in_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369779/normal_5fff448da146f.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/BPcEMjf/jaguar_ringtone_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_20975a2eaace46819ccf3ca7092ce099.pdf?index=trueIn PDF document text
    • http://kopedug.epizy.com/neonatal_jaundice_nursing_care_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/tufaju.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/alcoholic_cardiomyopathy_patient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/98523632600.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/how_many_questions_are_on_the_motorcycle_permit_test_in_sc.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/playa_del_carmen_seaweed_report.pdfIn PDF document text
    • http://jisixapuwalim.epizy.com/facebook_video_er_online_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/administrative_law_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/events_template_wordpress_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/animation_desk_pro_mod_apk.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_aa2f61a9024742c6a9c0f358f1eadb40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/38179766416.pdfIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_49864723bfa445c9923f15822bb50c65.pdf?index=trueIn PDF document text
    • http://sivutesafukim.rf.gd/bejovepur.pdfIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_f4f583eb33ce44368afebdaf1548aa71.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 4924 bytes
SHA-256: 27c56616ac3def0cd0f0d21295b55323d5a8701188838815ee4a3c3ffde74001
font_01_sfnt_off000104a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A0 10772 bytes
SHA-256: 4a46ea11a73788159ed4d8a854ced3ad821288985e6fe245581c6943fdfb6944
font_02_sfnt_off0001298b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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